Large scale and high density networks of tiny sensor nodes offer promising solutions for event detection and actuating
applications.

In this paper we address the effect of high density of wireless sensor network performance with a specific MAC protocol, the Lightweight Medium Access Control (LMAC). We propose a power control support for the LMAC protocol to successfully cope with high density issue.

Experimental results show that our power control support
significantly increases the number of nodes that can control a timeslot, without affecting other performance metrics such as the latency.